Author: Jose Menendez
Date: 00:10:09 02/03/02
Go up one level in this thread
On February 03, 2002 at 00:18:55, Brian Katz wrote: > >Can anyone please explain this? > >I am a USCF rated player, presently rated at 1920, but usually in the upper >1900's to low to mid 2000's. Highest rating acheived was 2070. > >I just recently played a 5 minute blitz game (no increments for either side or >added time, just straight 5 minute blitz) vs. Fritz 7 with the latest upgrade: >modification date January 11, 2002. >I drew this game quite easily, which I find puzzling. >Could it be that the Hash Tables I set were too high for my processor speed? I >have plenty of ram. I am using a Pentium II 350 MHz Processor with 384 sdram. >I set the Hash Tables for 128 MB by the advice of some on this site. >According to Steve Lopez from the Chessbase helpline, the formula for Hash >Tables should be: > 2 X processor speed X avg. seconds per move. > This was based on the Fritz 5 program, which allowed you to set the Hash Tables >to an exact number of KB's, such as 16,384. Since Fritz 6 and Fritz 7 have Hash >Tables with MB settings, you would have to divide your figure by 1000. >So for a 5 minute speed game which is 300 seconds, you would have to divide an >average game of 50 moves into that. > Since the first 10 moves on an average are played instantly, with practically >zero time used by the program, it is more practical to divide 300 seconds by 40 >moves rather than 50 moves. So that would be: > 2(350)=700 X (300 /40)=7.5 = 5250 / 1000 = 5.250 MB Hash Tables. >So you would probably set it at 4-8 MB Hash Tables according to this formula. > Chessbase states that if your hard drive doesn't have any disk activity at all >when you start the engine, then your Hash Tables settings are too timid. They >suggest that for Blitz games, 4-64 MB Hash Tables should be enough. Yet, the >Optimize Strength feature in Fritz 7 and Fritz 6 is only available for Blitz or >long games. Such is the case with the Fritz 6 interface. It is supposed to be >the case with Fritz 7 as well, but it works with all the other levels too. >(Another Bug? for Fritz 7?) > The Optimize Strength feature will set your Hash Tables at the highest possible >setting for your amount of Ram! That definitely conflicts with the above >mentioned 4-64 MB Hash Tables suggested for Blitz games. This is confusing to >me. >Please give your opinion on the Proper Hash settings for a 5 minute speed game >with a Pentium II 350 MHz Processor, with 384 MB SDRAM. Also, a general formula >for any time control would be appreciated based on processor speed. > Perhaps the mention of disk activity was really directed at computers a few >years ago, which usually for the most part had 32 to 64 to 128 MB SDRAM. So hard >disk activity (swapping) was quite common. Lately, many have 256 MB SDRAM and >up! Fritz 7 doesn't swap on my computer until perhaps 192 to 256 MB Hash Tables >are set. Usually closer to 256 MB Hash Table. > Was the fact that it was set for 128 MB Hash Tables too high for this game? >Only about 2-3 minutes of time was used by me and less for Fritz 7. > > Here is the game for anyone who is interested. I usually get crushed by this >program. That is why drawing this game as easily as I did (no take backs >involved) seems very odd to me. > >Opinions would be greatly appreciated. > >Katzparov,Brian (1920) - Fritz 7 (2676) [D43] >5 minute speed game HP Pent II 350 MHz, 02.02.2002 > >128MB, Fritz7.ctg, Pentium II 350 MHz 384 SDRAM > 1.d4 d5 2.c4 c6 3.Nc3 e6 4.Nf3 Nf6 5.Bg5 h6 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 >9.Bxc4 g6 10.0-0 Bg7 11.Rc1 0-0 12.e4 e5 13.d5 Nb6 14.Bb3 Rd8 15.Qe2 Bg4 16.Rfd1 >Rac8 17.dxc6 bxc6 18.h3 Bxf3 19.Qxf3 Qxf3 20.gxf3 h5 21.Rxd8+ Rxd8 22.Na4 Rd6 >23.Nc5 Bh6 24.Rc2 a5 25.Na4 Nxa4 26.Bxa4 Rd2 27.Rxd2 Bxd2 28.Bxc6 Bc1 29.b3 Kf8 >30.Kf1 Ke7 31.Ke2 g5 32.Kd3 Kd6 33.Be8 Ke7 34.Bc6 Kd6 35.Be8 Ke7 36.Bc6 Kd6 >37.Be8 ½-½ > >[D]4B3/5p2/3k4/p3p1pp/4P3/1P1K1P1P/P4P2/2b5 b
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